Fabric-cutting machine



Nov. 3 1925.

J. HEYMAN FABRIC CUTTING MACHINE Filed March 29, 1924 2 Sheets-Sheet 11,559,871 2 Sheeta4hut 2 J. HEYMA N FABRIC CUTTING MACHINE Filed larch2s Nov. 3, 1925.

Patented Nov. 3, 1925.

UNITED STATES PATEN ()FFICE.

JOHN HEYIVIAN, OF NF-YN YORK, N. Y.

FABRIC-CUTTING MACHINE.

application filed March 29, 1824.. Serial No. 762,760.

Fabric-Cutting Machines, of which the fol lowing is a specification.

This invention relates to power driven fabric cutting machinesand hasfor its principal object ,to provide a machine, whereby a piece offabric can be cut to strips of predetermined size and bias. I

Another object of this invention is to provide means for facilitatingand simplifying the adjustment of the machine for different sizes to becut.

Other objects will appear from the detailed description of my invention.

In the accompanying drawing, in which similar reference charactersdenote corre sponding parts, Fig. 1 is a top plan view of myfabrlccutting machine; Fig. 2 is a vertical longitudinal section on line22 of Fig. 1 thereof; Fig. 8 is a vertical horizontal cross section online 33 of Fig. 1 thereof; Fig. 4 is a similar section to that of Fig. 3on line 44 of Fig. 1 and Fig. 5 is a perspective View of a detail.

1O denotes a base or table over which the fabric F is' adapted to be fedfrom apile resting on the floor or a suitable support. Extending acrossthe base or table 10, is the fabric feeding mechanism 11 The lattercomprises two superposed rollers, one being a continuously and uniformlydriven roller 12, which is adapted to project slightly over the upperface of the base through a slot and the other .an idle roller 13,carried by rock arms 1e and adapted to be periodically brought intofrictional engagement with said driven roller 12 and when. the fabric Fis passed between saidrollers to feed the same. These rock arms arefixed to the ends of a crossspindle 14 suitably supported in bearings 14fixed onthe base 10. The roller 12, which may be journalled in suitablebearings (not shown) is adapted to be driven through suitabletransmission means from a power driven shaft .15 extendinglongitudinally near one side of the base 10. In the present embodiment,the shaft 15 carries a worm gear 16, which meshes with a worm 17 formedon the correspond ing end 12 of the roller 12, Extending transversely ofthe base and parallel to the roller 12', but in the plane of thedrivingshaft 15, is a shaft 18 suitably supported in the base'10 and which isadapted tobe con-1 tinuously driven with uniform speed from the shaft 15through bevel gears'19, 20 orv the like; Near the driven end ofthisshaftj 18, I provide means for periodically actuating the rock arms14 of the roller 13, whereby the latter will be brought into and out ofengagement with'the roller 12, so'as to feed the fabric intermittentlytowards the cutting mechanism to be described. These means comprise acylinder or drum 21 mounted on the shaft 18, so as to be adjustas blelongitudinally thereon'a-nd provided with a cam 22 actuating an arm 23fixed on the spindle 14: of the rock arms 14 and projecting downwardlythrough a recess 10 in the base 10. A spring 24 fixed at one end to thebase and at the other to the spindle 14'. has the tendency to normallyswing the roller 13 into elevated or open position; The cam 22 extendsthroughout the length of the cylinder or drum 21 and gradually increasesin width from one end toward the other. The drum 21 is so mounted on theshaft 18, that while it will revolve with the latter, it can be shiftedin longitudinal direction thereon, so that the roller 25 carried by thelower end of the arm 23 may be brought into contact with a wider ornarrower portion of'the cam 22 and'thereby vary the period of engagementof the two rollers 12, 13and conse quently the extent of the feeddesired. At its outer end, the drum 21 is formed with an annularcircumferentialv groove 21 in which is engaged a vertically extendingforked lever26 fixed to the end of a rod 27 extending transversely ofandbelow the case 10 and connected at its opposite end to a pin.28. Thelatter is'slidablyv guided in a cross slot 10 -of, the base and projectsupwardly. through a graduated slotted plate 29 fixed to the base 10.-The upper end of the pin 28 carries a knob 30 formed with an indexfinger pointing toward the gradua-:. t-ions 29 of the plate. Thesegraduations may denote in inches the adjustments desired for cutting thefabric in different widths.

In front of and at a suitable distance away from the feeding mechanism,-'I provide the cnttnwmechanism 31. The latter comprises atransversely.extending bar '32 formed with a stationary cutting jaw 33and a vertically swinging cutting jaw 3i, both extending longitudinallyof the bar. The movable jaw 34 is fulcrun'ied on a horizontal pivotborne in a bracket 36 projecting from the fulcrumed end-of the bar 32.This movable jaw has a bent tail extension 87, which projects downwardlythrough a recess 10 of the base 10, and carries at its free end a roller38.

In order to enable the cutting on a bias, the cutting mechanism can beadjusted to differentangles relative to the direction of feed. To thisend, the bar 32 is fulcrumed on a pin 39, which extends downwardlythrough a hole 10 of the base and is ro-. tatively borne ina bracket l0fixed to the base. The bar '32, at its free end is providedwith a memberA1, which slidably bears in a circularly curved guide groove 10 in thebase having as center the pivot 39. This member may be in form of aheaded screw bolt, which on the threaded portion, carries nut 42,whereby the bar 32 and the jaws 33 and 8i on being turned around thepivot. 89 along the curved guide groove 10 can be fixed in the desiredposition. -The pin 35. is continuously driven from the main shaft 15through bevel gears 43,144 or the like and carries a cam disc 4&5adapted to actuate the tail 37' through the medium of: therol1er 38carried by itpand cooperating withsa-id cam i5. The latter is so shapedthat'it will operate the movable jaw synchronously wi-th'the operationof the roller 25 by the cam. 22 and the periods between snccessivedownward strokes of the movable jaw will be the same as the maximumperiod of feedoccasioned by the widest part of the 02111122. As a resultthereof when the drum 21 is adjusted so that anarrower portion ofthe cam22 in, range with the roller; the fabric will-be intermittently fedshorter distances. while the movable jawwvilldesceud andhcut at' the endofeach maximum feeding; period. The opening or. upwardmovement-of thejaw 3i will be effected: automatically through spring 47' acting. on thejaw and suitably mounted on the pin.

4.8- denotesa member projecting ;I;'roi.n the free endof the bar; andadapted to slid-- ably engage the free end of the. movablejaw 34- and totightly hold the latter close to the stationary jaw '49 denotes a.suitable support for the goods atthe rear of the cutting mechanism -;.toprevent 7 it. I from r sagging.

This support maybe in form ore plate ex tending acrossthe. base 110- andfulcrmned' atone -end,. as at 49! and suitably. connected to the bar 32to swing withit in parallelism. when adjusting-"the cutting mechan-isn'ito cut onl'the bias'..-.

The mode of operation is as follows mittently raise and lower the idleroller 13 from and onto the goods and di.1ring the periods of engagementof the two rollers "12 and 13 the fabric will be fed; Themovable jaw 34:will be raised periodically by the cooperation. of the cam 4.5 and theroller'38, the periods between successive downward strokes 'correspondin to the maximum periods of feed.

lVhen it is desired to cut on a bias, the

cutting mechanism is turned on the pin 39' and the cam disc i5 adjustedon thesaid pin 39, so that the relative position between the cam'portionand the roller iti remains unchanged. 1

Since various modifications may be'made in the device without departingfrom the principle of my invention, I do not wish to restrict myself tothe details described and shown.

' That I claim is':' V

1. In a fabric cutting machine, a fabric feeding mechanism includingafeedroller, a cam for oscillating said roller, .a cutting mechanismincluding a movable-jaw and '.a cam for oscillating said jaw, both saidcams being in such relation to one another vthat.

the periods betweeirsuccessive cutting actions will correspond to theperiodsof max-- imnm feed of the fabric; 1 4 j I 2. A fabric feedingmechanism including an oscillating feed roller and an adjust-v able cammember actuating said roller andcapable of varying the stroke ofoscillation ofthelatter. .i -m A 3. A. fabric feeding mechanism,including anoscillating feed roller and 'a graduated adjustable cammember for actuating'said roller with varying strokes.

4:. A fabric feeding mechanism, including a continuously revolving feedroller, a -continuously oscillating roller cooperating therewith and anadjustable grz-i-duated cam member capable of I actuating said.:lastnamed roller with varying strokes.

5. A. fabric feeding mechanism, including a feed roller; a rocking a-rmcarrying said. roller and? a longitudinallygraduatedand displaceable cammember .actingronlsaid: arm and" capable of transmitting rocking rmovez.ment to. said arm with varying strokes. ...6. In a -fabrio cuttingri'nachine, .'.the...com bi-nation with aQsourCelof power, ofa' rfevolwingrfeed roller, an idlefeed roller, a rocking member. carrying thelatter? apgltaduated cam member acting upoirsald rocking v ber, bothsaid first roller and cam being continuously driven from said source ofpower and said cam member being adjustable relative to said rockingmember to vary the stroke of the latter.

7. In a fabric feeding mechanism, a feed roller, a rocking membercarrying the latter, a continuously revolving adjustable body formedwith a graduated cam portion acting on said rocking member, a slidablemember engaging said body and carrying adjustment indicating means.

8. In a fabric cutting machine, a feeding mechanism comprising acontinuously driven means and a periodically operating means tocooperate with the latter to feed the fabric, adjustable cam operatedmeans for varying the feeding periods, a cutting mechanism having anautomatically oscillated jaw and means for synchronizing the operationof said jaw with the feed of the fabric.

9. In a fabric cutting machine, a feeding mechanism comprising acontinuously driven means and a periodically operating means adapted tocooperate with the latter to feed the fabric, adjustable cam operatedmeans for varying the feeding periods, a circularly adjustable cuttingmechanism having an oscillating jaw and means for includingv acontinuously revolving adjust-' able cam and a member cooperating withthe latter to transmit rocking movement to said second roller, a cuttingmechanism including a vertically rocking cutting jaw and a cam forproducing the rocking movement of said jaw, said two cams being in suchrelation that the periods between successive cutting actions willcorrespond to the periods of maximum feed of the fabric. Y

11. In a fabric cutting machine, a cutting mechanism comprising ahorizontally pivoted member formed with a stationary aw, a second jawpivoted to said member to swing vertically, a continuously driven camadjustably mounted on the pivot of said JOHN HEYMAN.

